Multiple Instance of work item appears in the SAP Inbox of user even after approval

Hello all,

We have a designed a Purchase Order approval workflow by making copy of standard PO Workflow.

We have 3-level approval to approve the Purchase Order. The approval is done by Fiori Application.

But whenever the first level approver approves the Purchase Order from either Fiori Application or using

transaction 'ME28', it displays that the PO is released from first level at the same time again the work item appears

in first level approver's SAP Inbox for approval and in the workflow log it displays in the 'READY' state. The same work item

goes to next level approver for approval.

Does any one have idea why the work item again appears in first level approver's SAP Inbox.

Please suggest.

Thanks in advance.

Thanks and regards,

Rupali Patil.